---
title: "Streamable HTTP MCP surface for clients that may not show purchase links"
method: POST
path: "/mcp/chatgpt"
---

# Streamable HTTP MCP surface for clients that may not show purchase links

`POST /mcp/chatgpt`

## Request

- Base URL: `https://probable.media`
- URL: `https://probable.media/mcp/chatgpt`
- Auth: none declared

The nine anonymous read tools of /mcp, with no checkout, membership, or x402 URL in any response: get_membership returns plan names, prices, and the informational plans page, and an edition outside the public window returns a Founding Pro boundary carrying no payment URL. The five Founding Pro tools—export_edition, list_watches, create_watch, update_watch, and acknowledge_watch—are not registered here. Clients that can complete a purchase should use /mcp instead.

## Request body

- object
  - `jsonrpc` '2.0', required
  - `id` union
    - string
    - integer
  - `method` string, required
  - `params` object

## Response `200`

JSON-RPC result, as JSON or as a single Server-Sent Event

- object

## Other responses

- `400`: Malformed JSON-RPC request
- `403`: Untrusted Host or Origin header

---

[API](https://skmtc.dev/probable/apis/probable-public-api.md) · [All operations](https://skmtc.dev/probable/apis/probable-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/probable/apis/probable-public-api/revisions/28e1acd459f3?raw)